JPS5920768B2 - Starting and stopping device for open-end spinning machine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a starting and stopping device for an open-end spinning machine, and although the structure is extremely simple, the purpose of this invention is to prevent the spinning unit from stopping when yarn breakage occurs. The spinning unit is automatically lowered to the lower stop position by its own weight, and when restarted, the spinning unit is automatically raised to the upper spinning operation position by the lifting member, and the spinning operation is reliably stopped in the event of yarn breakage. A fifth object of the present invention is to provide a starting and stopping device for an open-end spinning frame that can easily perform a yarn splicing operation at the time of restart in a short period of time.

Below, the configuration of an open-end spinning machine embodying the present invention will be explained with reference to the drawings. In this embodiment, multiple spindle spinning units are arranged in parallel on the front of the machine frame 11,
FIG. 1 shows an example of one spindle.

Now, at the lower end of each spinning unit, a support rod 13 is vertically arranged and fixed on the front surface of the machine stand 11 via a support bracket 12, and the support rod 13 has a feed roller, a combing jig, and a rotor (not shown). A spinning unit 14 containing a spinning unit (not shown) is supported so as to be vertically movable between an upper spinning operation position and a lower stopping position.

A feed roller shaft 1 is provided on the rear surface of the spinning unit 14.
5. A combing roller shaft 16 and a rotor shaft 17 are provided protrudingly, and the feed roller shaft 15 is provided with an electromagnetic clutch MCI and a driven gear 18.

A drive shaft 19 common to each spinning unit is disposed above the rear end of the feed roller shaft 15, and a drive gear 20 that can be engaged with and disengaged from the driven gear 18 as the spinning unit 14 moves up and down is disposed on the drive shaft 19. installed.

Further, above the rear ends of the combing roller shaft 16 and the rotor shaft 17, there are drive belts 21 and 22 common to each spinning unit.
As the stretched fiber spinning unit 14 moves up and down, it can be engaged with and disengaged from the combing roller shaft 16 and the rotor shaft 17, respectively.

As shown in FIG. 2, a hooking recess 23 is formed on the rear surface of the outer periphery near the upper end of the support head 13, and the spinning unit 14
A mounting recess 24 is formed in the inner surface of the spinning unit 14 near the rear upper end so as to correspond to the locking recess 23 when the spinning unit 14 is raised to the upper spinning operation position.

A latching member 25 made of a magnetic material is disposed within the mounting recess 24 so as to be able to engage and disengage from the latching recess 23 , and is movable in a direction perpendicular to the axis of the support rod 13 .
A spring 27 provided between the latching recess 23 and the latching recess 23 presses the latching recess 23 .

Therefore, when the spinning unit 14 is lifted and the top surface of the spinning unit 14 comes into contact with the stopper part 28 provided on a part of the machine stand 11, as shown in FIG. The spinning unit 14 is engaged with the locking recess 23 and held in the upper spinning operation position against its own weight.

In this spinning operation position, as shown in FIG. 1, the driven gear 18 on the feed roller shaft 15 is
When the combing roller shaft 16 and the rotor shaft 17 are engaged with the drive gear 20 on the drive belt 9, the combing roller shaft 16 and the rotor shaft 17 are engaged with the drive belt 21, 2.
2, the feed roller, combing roller and rotor in the spinning unit 14 are rotated, and the sliver 31 fed from the can 29 via the collector 30 is opened by the combing roller, and then the sliver 31 is spread by the rotor. The fibers are heated in a focused manner and spun into a yarn 32, which is sent out from the yarn guide tube 33 to the outside of the spinning unit 14.

A winding mechanism similar to that of a conventional open-end spinning machine is arranged above the spinning unit 14.

That is, a guide rod 34 common to all spindles is arranged above the spinning unit 14, a draw-off roller 35 is arranged so as to be actively rotatable, and a support rod 36 is arranged above it. .

A roller holder 37 is rotatably supported for each weight on the support rod 36, and a top roller 38 is rotatably supported at the tip of the roller holder 37.

A spring (not shown) is provided between the support rod 36 and each roller holder 37, and urges the top roller 38 to contact the outer peripheral surface of the draw-off roller 35.

Therefore, due to the rotation of the draw-off roller 35, the top roller 38 is rotated in contact with all the spindles simultaneously, and each spinning unit 14
The yarn 32 sent out from the yarn guide tube 33 passes through both rollers 35, 3.
8 and pulled out upwards.

Above the support rod 36 is a take-up roller 3 common to all spindles.
A cradle arm 4 is mounted on a mounting frame 40 fixed to the machine base 11 at the rear upper part of the cradle arm 9.
1 is rotatably supported at its base end, and a bobbin 42 is rotatably supported between the distal ends of its cradle arm 41.

A pressure device 43 is provided between the mounting frame 40 and the cradle arm 41, and is adapted to press each bobbin 42 toward the outer peripheral surface of the take-up roller 39.

Therefore, the rotation of the winding roller 39 causes the bobbin 42 to contact and rotate all spindles simultaneously, and the thread 32 drawn out by the draw-off roller 35 and the top roller 38 is wound around the outer periphery of the bobbin 42 to form a cheese 44. do.

A yarn breakage detection device 45 is provided on the front surface of the machine stand 11 so as to be located between the yarn guide tube 33 and the guide rod 34, and detects when a yarn breakage occurs during the aforementioned spinning operation. The controller 46 generates a detection signal to demagnetize the electromagnetic clutch MCI via the controller 46.

On the other hand, an electromagnet EM is provided in the mounting recess 24 of the spinning unit 14, as shown in FIG. 46, the latching member 25 is energized to the second
It is designed to be moved by suction to the right side of the figure.

Therefore, when thread breakage occurs, the latching member 25 is attracted and moved to the right as the electromagnet EM is excited, and the support rod 13
The spinning unit 14 is released from the upper locking recess 23, is released from the upper spinning operation position, and is automatically lowered by its own weight to the lower stop position.

The machine stand 1 is located below the spinning unit 14.
A rotary shaft 49 is rotatably supported on the rotary shaft 1 via bearings 47 and 48, and an electromagnetic clutch MC2 and a driven gear 50 are provided on the rotary shaft 49.

A drive shaft 51 common to each spinning unit is installed below the rear end of the rotating shaft 49, and a drive gear 52 that engages with the driven gear 50 is attached to the drive shaft 51.

Further, an engaging member 53 is provided at the lower end of the rear surface of the spinning unit 14.
An eccentric cam 54 is attached to the front end of the rotating shaft 49 so that the protruding cam 54 can engage with the engaging member 53 of the spinning unit 14 as it descends.

As shown in FIG. 3, this eccentric cam 54 has a cam surface a with a large distance A from the center of rotation, and a cam surface with a small distance B from the center of rotation, In a free state where the electromagnetic clutch MC2 is demagnetized, it is held stationary with the heavier cam surface a facing downward.

Therefore, when the spinning unit 14 is lowered due to yarn breakage as described above, the engaging member 53 engages with the cam surface of the eccentric cam 54 as shown by the solid line in FIG. The downward movement is regulated to a predetermined amount H, and the spinning unit 14 is held at the lower stop position.

At this stop position, the feed roller shaft 1
When the driven gear 18 on the spinning unit 5 is disengaged from the drive gear 20 on the drive shaft 19, the combing roller shaft 16 and the rotor shaft 17 are disengaged from the respective drive belts 21 and 22, and the feed roller in the spinning unit 14 , the combing roller and rotor are stopped.

Further, in this embodiment, the difference between the distance A from the rotation center on the cam surface a of the eccentric cam 54 and the distance B from the rotation center on the cam surface is the descending amount H of the spinning unit 14.
The rotation of the eccentric cam 54 causes the spinning unit to be raised from a lower stop position to an upper spinning operating position.

Therefore, when the electromagnetic clutch MC2 is excited by the controller 46 and the eccentric cam 54 is rotated when the spinning operation is resumed, the cam surface a of the eccentric cam 54 is brought into contact with the engaging member 53 as shown by the chain line in FIG. upon engagement, the spinning unit 14 is automatically raised from a lower stop position to an upper spinning operating position;
Due to the engagement of the latching member 25 with the latching recess 23,
It is latched and held in its spinning operation position.

Next, the circuit configuration of the controller 46 will be explained according to FIG. 4. In this circuit, first to sixth circuits are connected between electromagnetic lines LL.

Now, the electromagnetic clutch MCI provided on the feed roller shaft 15 is connected to the first circuit.

The detection switch LS and relay CR1 of the thread breakage detection device 45 are connected to the second circuit, and the normally closed contact CR1-1 of the relay CR1 is connected to the first circuit, and the normally open contact CR1-2 is connected to the second circuit. , CR1-3 are connected to the third circuit and the fourth circuit.

An electromagnet EM for releasing the locking member 25 is connected to the third circuit.

The first contact TR1 is connected to the fourth circuit, and when its normally closed contact TRII is connected to the third circuit, the normally open contacts TR1-2 are connected to the fifth circuit.

An electromagnetic clutch MC2 provided on the rotating shaft 49 of the eccentric cam 54 is connected to the fifth circuit.

A second timer TR2 is connected to the sixth circuit in series with the normally open contacts TR1-2 of the fifth circuit, and the normally open contacts T
R2-1 is connected in series with electromagnetic clutch MC2 in the fifth circuit.

Next, the operation of the open-end spinning machine configured as described above will be explained.

Now, in FIGS. 1 and 2, the latching member 25 is attached to the latching recess 23.
This figure shows a state in which the spinning unit 14 is engaged with and held in the upper spinning operation position.

In this state, the driven gear 18 on the feed roller shaft 15 engages with the drive gear 20 on the drive shaft 19, and the combing roller shaft 16 and rotor shaft 17 contact each drive belt 21, 22, respectively. , electromagnetic clutch MC
I is excited.

Therefore, the sliver 31 supplied from the can 29 via the collector 30 by the feed roller is opened by the combing roller, and then heated in a focused manner by the rotor and spun into yarn 32.

Then, the yarn 32 is drawn out of the spinning unit 14 from the yarn guide tube 33 by a draw-off roller 35 and a top roller 38, and is wound around the outer periphery of a bobbin 42 by the rotation of a tag winding roller 39 to form a cheese 44.

If yarn breakage occurs during this spinning operation, the yarn breakage detection device 45 senses it, closes the detection switch LS in the second circuit in FIG. 4, and energizes the relay CR1.

Due to the bias, the normally closed contact CR1-1 of the first circuit is opened and the electromagnetic clutch MCI is demagnetized.
The normally open contact CRI-3 of the circuit is closed and the first
RI is set.

Therefore, the feed roller shaft 15 is separated from the drive shaft 19, the feed roller is stopped, and the supply of the sliver 31 is stopped.

Further, the normally open contact CR1-2 of the third circuit is closed by the energization of the relay CR1, and the electromagnet EM is excited.

As a result, the latching member 25 shown in FIG. 2 is moved to the right by suction and removed from the latching recess 23 on the support rod 13, and the spinning unit 14 is released from the latching state to the upper spinning operation position. , it is automatically lowered to the lower stopping position by its own weight.

When the engaging member 53 at the lower end of the spinning unit 14 engages with the cam surface of the eccentric cam 54 as shown by the chain line in FIG. It is held in the stopped position.

Therefore, at the stop position of the spinning unit 14, when the driven gear 18 on the feed roller shaft 15 is disengaged from the drive gear 20 on the drive shaft 19, the combing shaft 16 and the rotor shaft 17 are It is removed from the drive belts 21 and 22, and the spinning operation is stopped.

Thereafter, the inside of the rotor is dynamically cleaned in preparation for yarn splicing, and when the first timer TRI in the fourth circuit in FIG. 4 times up, the normally closed contact TRl-1 of the third circuit is opened and the electromagnet EM is demagnetized, and the normally open contact T of the fifth circuit
When Rl-2 is closed and the electromagnetic clutch CM2 is excited, the second timer TR2 is also set.

By energizing the electromagnetic clutch MC2, the rotating shaft 49 shown in FIG. 1 is connected to the drive shaft 51, and the eccentric cam 54 is rotated.

As a result, the cam surface a of the eccentric cam 54 engages with the engaging member 53 as shown by the chain line in FIG.
When the spinning unit 14 is raised from the lower stop position and the upper surface of the spinning unit 14 comes into contact with the stopper part 28 of the machine stand 11, the latching member 25 engages with the latching recess 23, and the spinning unit 14 moves to the upper spinning position. It is latched and held in the operating position.

After the spinning unit 14 is raised and latched to the spinning operation position in this way, the second timer TR2 in the sixth circuit in FIG.
times up, the electromagnetic clutch MC2 of the fifth circuit is demagnetized, and the rotation of the eccentric cam 54 is stopped.

Therefore, in this state, as shown in FIG.
0, the combing roller shaft 16 and the rotor shaft 17 come into contact with each drive belt 21, 22, respectively, and when the combing roller and rotor in the spinning unit 14 are started, a splicing operation is performed. In the middle of the process, the feed roller is activated as the electromagnetic clutch MCI is energized.

Next, the second embodiment shown in FIGS. 5 and 6 will be described. In this embodiment, the structure of the lifting member for raising the spinning unit 14 from the lower stop position to the upper spinning operation position is , which is different from the first embodiment described above.

That is, in this embodiment, when the spinning unit 14 is lowered, the engaging member 53 engages with the upper end of the bearing 47 on the machine stand 11, and the stopping position of the spinning unit 14 is regulated.

A rotating lever 64 is attached to the front end of the rotating shaft 49 in place of the eccentric cam 54, and as the rotating lever 64 rotates, the spinning unit 1 is rotated as shown by the chain line in FIG.
4 is raised from the stop position to the spinning operation position.

As described in detail above, the present invention includes a spinning unit that is arranged to be movable up and down between an upper spinning operation position and a lower stop position, and a spinning unit that is moved against its own weight to the spinning operation position. a latching member for latching and holding; and a releasing means for releasing the latching member when yarn breakage occurs to allow the spinning unit to descend by its own weight to a stop position;
By providing a lifting member that engages at least a part of the spinning unit at the time of restart and raises the spinning unit to the spinning operation position, yarn breakage can be prevented despite the extremely simple structure. When a yarn breakage occurs, the spinning unit is automatically lowered to the lower stop position by its own weight, and when restarted, the spinning unit is automatically raised to the upper spinning operation position by the lifting member, and as the yarn breakage occurs, the spinning unit is automatically lowered to the lower stop position. Once the operation is reliably stopped, the splicing operation at the time of restart can be easily performed in a short time, which is an excellent effect.

[Brief explanation of the drawing]

Fig. 1 is a schematic side view of an open-end spinning machine embodying the present invention, Fig. 2 is an enlarged side view of the main parts of the spinning unit shown in Fig. 1, and Fig. 3 is a main part showing an eccentric cam. 4 is a control circuit diagram, FIG. 5 is a side view of a main part of a spinning unit showing another embodiment, and FIG. 6 is a longitudinal sectional view of a main part showing a rotating lever.

Claims (1)

[Scope of Claims] 1. A spinning unit arranged to be movable up and down between an upper spinning operation position and a lower stop position, and the spinning unit being latched and held in the spinning operation position against its own weight. a latching member for releasing the latching member when yarn breakage occurs, and a release means for releasing the latching member to allow the spinning unit to descend by its own weight to a stop position; and at least a part of the spinning unit when restarting. A lifting member that engages with the spinning unit and raises the spinning unit to a spinning operating position. 2. The starting and stopping device for an open-end spinning frame according to claim 1, wherein the raising member is an eccentric cam that is rotated at the time of restart. 3. Starting the open-end spinning machine according to claim 2, wherein the eccentric cam engages with a part of the spinning unit that is being lowered to regulate the stopping position of the spinning unit. , stopping device.